FR2368677A2 - Four pour tres hautes temperatures - Google Patents

Four pour tres hautes temperatures

Info

Publication number
FR2368677A2
FR2368677A2 FR7631408A FR7631408A FR2368677A2 FR 2368677 A2 FR2368677 A2 FR 2368677A2 FR 7631408 A FR7631408 A FR 7631408A FR 7631408 A FR7631408 A FR 7631408A FR 2368677 A2 FR2368677 A2 FR 2368677A2
Authority
FR
France
Prior art keywords
heating element
several
esp
borings
graphite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7631408A
Other languages
English (en)
Other versions
FR2368677B2 (fr
Inventor
Alain Gouronnec
Francois Haussonne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Etat Francais
Original Assignee
Etat Francais
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Etat Francais filed Critical Etat Francais
Priority to FR7631408A priority Critical patent/FR2368677A2/fr
Publication of FR2368677A2 publication Critical patent/FR2368677A2/fr
Application granted granted Critical
Publication of FR2368677B2 publication Critical patent/FR2368677B2/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/029—Furnaces therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/60—Optical fibre draw furnaces
    • C03B2205/62—Heating means for drawing
    • C03B2205/64—Induction furnaces, i.e. HF/RF coil, e.g. of the graphite or zirconia susceptor type
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/60—Optical fibre draw furnaces
    • C03B2205/90—Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g. by modification of the core tube shape or by using baffles
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/60—Optical fibre draw furnaces
    • C03B2205/90—Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g. by modification of the core tube shape or by using baffles
    • C03B2205/96—Manipulating the gas flow through the furnace other than by use of upper or lower seals, e.g. by modification of the core tube shape or by using baffles using tangential feed approximately perpendicular to the draw axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • General Induction Heating (AREA)
  • Furnace Details (AREA)

Abstract

a. Four pour très hautes températures. b. Il se distingue en ce que l'élément chauffant 30, de forme cylindrique, est percé d'un pluralité de laboratoires identiques 311 -314 dont les axes sont régulièrement échelonnés sur un cylindre de perçage correspondant à la région de température maximale créée par l'enroulement d'induction. Avantageusement il est percé en outre d'une cheminée 32 cylindrique coaxiale d'un diamètre permettant de symétriser la température de part et d'autre dudit cylindre de perçage des laboratoires. c. Utilisable en particulier à l'étirage de matériaux filables, par exemple de preformes à base de silice pour fibres optiques.
FR7631408A 1976-10-19 1976-10-19 Four pour tres hautes temperatures Granted FR2368677A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7631408A FR2368677A2 (fr) 1976-10-19 1976-10-19 Four pour tres hautes temperatures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631408A FR2368677A2 (fr) 1976-10-19 1976-10-19 Four pour tres hautes temperatures

Publications (2)

Publication Number Publication Date
FR2368677A2 true FR2368677A2 (fr) 1978-05-19
FR2368677B2 FR2368677B2 (fr) 1982-04-23

Family

ID=9178928

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631408A Granted FR2368677A2 (fr) 1976-10-19 1976-10-19 Four pour tres hautes temperatures

Country Status (1)

Country Link
FR (1) FR2368677A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401103A1 (fr) * 1977-04-30 1979-03-23 Sumitomo Electric Industries Procede et appareil de production de fibres de transmission optique
WO1980002139A1 (fr) * 1979-03-29 1980-10-16 A Regreny Machine de multifibrage permettant un etirage simultane d'une pluralite de fibres optiques puis un cablage multifibre en ligne
WO2000068157A1 (fr) * 1999-05-10 2000-11-16 Pirelli Cavi E Sistemi S.P.A. Four a induction permettant de tirer des preformes de fibres optiques de fort diametre et procede correspondant
US6828505B1 (en) 1996-06-21 2004-12-07 Pirelli Cavi S.P.A. Method and electrical apparatus comprising a water tree resistant insulating composition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401103A1 (fr) * 1977-04-30 1979-03-23 Sumitomo Electric Industries Procede et appareil de production de fibres de transmission optique
WO1980002139A1 (fr) * 1979-03-29 1980-10-16 A Regreny Machine de multifibrage permettant un etirage simultane d'une pluralite de fibres optiques puis un cablage multifibre en ligne
DE3041446C2 (fr) * 1979-03-29 1989-03-02 Alain Lannion Fr Gouronnec
US6828505B1 (en) 1996-06-21 2004-12-07 Pirelli Cavi S.P.A. Method and electrical apparatus comprising a water tree resistant insulating composition
WO2000068157A1 (fr) * 1999-05-10 2000-11-16 Pirelli Cavi E Sistemi S.P.A. Four a induction permettant de tirer des preformes de fibres optiques de fort diametre et procede correspondant
US7814767B2 (en) 1999-05-10 2010-10-19 Prysmian Cavi E Sistemi Energia S.R.L. Method and induction furnace for drawing large diameter preforms to optical fibres

Also Published As

Publication number Publication date
FR2368677B2 (fr) 1982-04-23

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Legal Events

Date Code Title Description
TP Transmission of property